Practice online oracle dba quiz

I am presenting here the Oracle DBA quiz. I hope you like it

This Oracle DBA online test check the understanding on various topics like RMAN, Oracle Structures,Backup & recovery , Oracle Memory structure, Background processes, Dictionary views , alert logs ,oracle tablespace ,indexes , profiles and many more

The below test is randomized Oracle DBA quiz and select 40 questions from the set of many questions,so each time you try to attempt it, you will get different questions in different order and option would also be in different order, So it will be fun practicing with this tool. You can try as many times as you want till you feel comfortable about it

Instructions for online test

1.This quiz consists of 40 questions .It is recommended to complete the test in 60 min
2. It consists both single choice and more than one choice questions to test your knowledge
3. You can press the submit button at the end of your test and get the final score
4.You will also get the know the correct choice after you finished the test.

1. Which of the following clauses in a create user statement restricts the number of tables a user can add to a tablespace?

profile

quota on

default tablespace

identified by

Question 1 of 40

2. Which of the following choices lists an alter user option that can be executed by the user herself or himself?

default tablespace

identified by

profile

temporary tablespace

Question 2 of 40

3. You issue the alter tablespace read only command against an Oracle database. Which of the following choices best describes what happens next?

Oracle puts the tablespace into read-only mode after the last user logs off.

Oracle puts the tablespace into read-only mode after the last prior transaction against that tablespace commits while preventing subsequent DML until the change happens.

Oracle immediately puts the tablespace into read-only mode.

Oracle returns an error.

Question 3 of 40

4. Which of the following operations do not require Oracle to store information in an undo segment as part of the transaction?

select

update

insert

delete

Question 4 of 40

5. Which of the following choices identifies a constraint on performing alter tablespace resize operation if the intended size of the tablespace is larger than the tablespace’ s current size?

Presence of objects in the datafile resized

Whether AUTOEXTEND is in use on datafiles for the tablespace

Availability of space on disk where datafiles are added

Availability of space in memory for temporary storage of blocks in tablespace

Question 5 of 40

6. You are running Oracle in America in support of a financial analysis project for the government of Egypt. In order to produce reports that display money amounts as Egyptian pounds, rather than dollars, which of the following initialization parameters would be useful?

NLS_DATE_FORMAT

NLS_LANG

NLS_SORT

NLS_CURRENCY

Question 6 of 40

7. You are considering using the MTS architecture on the Oracle database. Session information when shared servers are being used is stored where in the Oracle database?

In the buffer cache keep area

Large pool area

In the redo log buffer

In the shared pool

In the PGA

Question 7 of 40

8. On an Oracle server installation, which of the following reorganizations of your indexes would be appropriate in order to improve performance of queries on tables containing all words in the dictionary starting with the letter 'S'?

Convert your B-tree index to a reverse-key index.

Convert your bitmap index to a B-tree index.

Convert your reverse-key index to a B-tree index.

Convert your B-tree index to a bitmap index.

Question 8 of 40

9. You are identifying dictionary objects in the Oracle database. Which of the following is a view in the data dictionary?

DBA_TABLES

SYS.AUD$

V$DATABASE

EMP

Question 9 of 40

10. Which one of the following RMAN commands is equivalent to the SQL statement ALTER DATABASE RENAME FILE ?

RENAME

SWITCH

CATALOG

CHANGE

Question 10 of 40

11. You are analyzing how Oracle processes user statements. SQL and PL/SQL parse information is stored in which of the following database memory areas?

Buffer cache

Dictionary cache

PGA

Row cache

Library cache

Question 11 of 40

12. The user is selecting data from the Oracle database. Which of the following processes handles obtaining data from Oracle for that user?

The server process obtains information for the user.

The DBW0 process obtains information for the user

The listener process obtains information for the user.

The user process obtains information on its own.

Question 12 of 40

13. After creating a new user for your Oracle database, a user still complains he or she cannot log in because of insufficient privileges errors. Which of the following actions should you take?

Grant create table privileges to the user

Unlock the user's account

Reset the user's password

Grant the CONNECT role to the user

Question 13 of 40

14. Which one of the following statements is incorrect with respect to RMAN's CROSSCHECK command?

It updates the non-availability of the files by updating the information in the recovery catalog with the appropriate status.

It identifies the backup sets or image copies that are either corrupted or have been accidentally deleted.

RMAN automatically deletes information pertaining to the image copy from the repository if it is physically not available.

RMAN crosschecks the availability of the backup sets by verifying the information stored in its repository with the backup sets that are physically available.

Question 14 of 40

15. Session information when dedicated servers are being used is stored where in the Oracle database?

In the PGA

Large area

In the redo log buffer

In the buffer cache keep area

In the shared pool area

Question 15 of 40

16. The best choice for decreasing size requirements for tables that need only be accessed via the primary key in oracle is which of the following?

Increase the PCTFREE value set for table blocks.

Create an index-organized table to store the data.

Create more indexes on the table.

Drop the primary key

Question 16 of 40

17. If you wished to make it so that every user in Oracle could have only one connection to the database at a time, which of the following choices identifies how you would do it?

Set IDLE_TIME in the DEFAULT profile to 1

Set LICENSE_MAX_SESSIONS = 1 in init.ora

Set SESSIONS_PER_USER in the DEFAULT profile to 1

Set SESSIONS_PER_USER = 2 in init.ora

Question 17 of 40

18. A User accidentally drops a very critical table. What kind of failure just occurred?

Instance failure

Human error

Statement failure

Process failure

Question 18 of 40

19. A disk crashes that contains the only copies of all four of your online redo log files. How would you alter your Oracle database to prevent this from causing much damage in the future?

Change the CONTROL_FILES parameter in the init.ora file.

Create multiple members for each of your four groups and place them on different disks.

Use the alter database add LOGFILE GROUP 5;

Set LOG_BLOCK_CHECKSUM in the init.ora file.

Question 19 of 40

20. You need to remove a column from the database. Which of the following choices best identifies how to do so if your objective is to quickly execute the task without necessarily freeing up space in your tablespace?

alter table modify column

alter table drop column

alter table set unused column

truncate table

Question 20 of 40

21. When choosing a character set and national character set, which of the following factors should not enter into consideration?

Your national character set and character set should be closely related where possible.

Oracle supports only English-like languages as its character set for entering SQL and PL/SQL commands

You can use variable-length multibyte character sets as both character sets on your database.

Your character set must either be US7ASCII or a superset of it.

Question 21 of 40

22. You issue the following statement from SQL*Plus: startup mount. Where does Oracle obtain values for starting the instance?

From your init.ora file or spfile

From the default settings for the tablespace

From the default settings in your redo log file

From Oracle default values in OS

Question 22 of 40

23. Records from the data dictionary information are stored in which of the following database memory areas?

Row cache

Buffer cache

Library cache

Session UGA

Question 23 of 40

24. Which one of the following statements is true while taking tablespace backups using RMAN?

RMAN does not require the tablespace to be in backup mode

RMAN generates extra redo information during online backups when compared with user-managed online backups.

You need to make the tablespace offline.

You need to keep the tablespace in backup mode explicitly.

Question 24 of 40

25. When we issue the commit statement in the session, which of the following things will not occur?

Acquired undo segment locks are released.

Redo entry generated for committed transaction.

Cached data is saved immediately to disk.

Acquired row or table locks are released.

Question 25 of 40

26. You issue the following statement in Oracle:
CREATE UNIQUE BITMAP INDEX empl_lastname_indx_01
ON employee (lastname ASC);
What is wrong with this statement for dictionary-managed tablespaces?

Bitmap indexes cannot be unique.

The tablespace clause must be omitted.

You cannot use the nosort keyword in creating an index.

You should omit the asc keyword.

Question 26 of 40

27. Which of the following is the init.ora parameter that indicates the size of each buffer in the buffer cache?

DB_BLOCK_BUFFERS

DB_BLOCK_SIZE

ROLLBACK_SEGMENTS

BUFFER_SIZE

Question 27 of 40

28. You need to identify the remaining free space in a tablespace. From which of the following views would you get this information most easily?

DBA_EXTENTS

DBA_FREE_SPACE

V$TABLESPACE

DBA_TABLESPACES

Question 28 of 40

29. You alter a tablespace’ s default storage settings in the Oracle database to increase the size of initial extents. Which of the following choices identifies when the change will take effect for tables that already exist in that tablespace?

The change takes effect immediately.

The change takes effect when data is removed from the table.

The change will not take effect for existing tables.

The change takes effect when data is added to the table.

Question 29 of 40

30. Which one of the following statements is incorrect about direct-path insert operations?

Direct-path insert enables you to copy data from one table to another table within the same database.

It speeds up the insert operation, bypassing the buffer cache.

Direct-path insert can be implemented either in the serial mode or the parallel DML mode.

To load data using the serial mode, you must activate the direct-path insert by specifying the SERIAL hint.

Direct-path insert can be performed when using the INSERT INTO... SELECT statement.

Question 30 of 40

31. You have assigned 10 tables to the keep pool. How should you determine the appropriate size for your keep pool?

Based on the number of blocks in the table only

Based on the size of your shared pool

Based on the number of blocks in the table plus blocks in associated indexes

Based on the number of blocks in associated indexes only

No Answer is Correct

Question 31 of 40

32. Your Oracle EMP table contains many unique values in the FIRST_NAME column. You want to index that column to take advantage of this fact in query access. Which of the following indexes might you use?

reverse key index

Bitmap Index

Simple B-tree index

Function-based index

Question 32 of 40

33. You are trying to find the ALERT file on a host machine for a database (11g and below) you have never administered before. Which of the following initialization parameters is used to identify the location of the ALERT file?

LOG_ARCHIVE_DEST

BACKGROUND_DUMP_DEST

CORE_DUMP_DEST

USER_DUMP_DEST

Question 33 of 40

34. As the DBA, you are attempting to limit user's misuse of Oracle's ability to use host machine resources. Which of the following features of the Oracle database is useful for this purpose?

Undo segments

Profiles

Roles

Parameter files

Question 34 of 40

35. We are designing the physical database layout on your host machine. What is the relationship between tablespaces and datafiles in the Oracle database?

One tablespace has only one datafile.

One datafile can contain many tablespaces.

One tablespace can have many datafiles.

Many tablespaces can share one datafile.

Question 35 of 40

36. You are performing the steps that will create your Oracle data dictionary. The objects in the Oracle data dictionary are part of which of the following schemas?

SYSTEM

SYS

PUBLIC

SCOTT

Question 36 of 40

37. You are defining storage for various segment types in the Oracle database. Which of the following is not a valid type of segment in Oracle?

Sequence segment

Undo segment

Data segment

Temporary segment

Question 37 of 40

38. You are adding redo logs to the Oracle database. Creating a new redo log adds information to which of the following Oracle resources?

Shared pool

Library cache

SGA

Control file

Question 38 of 40

39. You want to perform some maintenance and You issue the shutdown command at 9 p.m. on a Saturday. One hours later, the database is still in the process of shutting down. Which of the following options did you most likely use in order to shut down the database?

shutdown immediate

shutdown transnational

shutdown normal

shutdown abort

Question 39 of 40

40. You are about to drop a tablespace. Which of the following statements can be used for dropping tablespaces that contain parent tables in foreign key relationships?

drop tablespace including contents

alter database datafile offline drop

drop tablespace cascade constraints

alter tablespace offline immediate

Question 40 of 40

I hope you like this Oracle DBA online quiz and it helps in your examination preparation. Best of Luck for the Oracle certification Examination. Please do provide feedback on it. We will also be adding more quizzes and questions in future.

Happy Learning!!!!

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